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Neon screwdriver vs two-pole tester

Updated: October 2026

You are about to treat a glow as proof a circuit is dead. Neon screwdriver vs two-pole tester is where that decision fails. A neon can only suggest a point might be live. A two-pole indicator places two probes across the supply, which is the class HSE GS38 points to for a dead test. None of the eight listings on the [voltage tester screwdriver comparison](/hub/hand-tools/voltage-tester-screwdriver) is that instrument. The Products Compared editorial team used GS38, the Electricity at Work Regulations 1989, HSR25, and notes from NICEIC and SELECT. There is no laboratory test, and no two-pole kit price is quoted here. A qualifying purchase through our links can earn a commission at no extra cost to you.

You are about to treat a glow as proof a circuit is dead. Neon screwdriver vs two-pole tester is where that decision fails. A neon can only suggest a point might be live.

Our top picks

Bosch Professional Bosch SL3x65 phase tester

Best overall

Bosch Professional Bosch SL3x65 phase tester
8.6/10about £5.99
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Rolson Rolson 28110 2-piece pair

Preis-Tipp

Rolson Rolson 28110 2-piece pair
7.9/10about £4.23
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KAIWEETS KAIWEETS contact and non-contact pen

Alternative

KAIWEETS KAIWEETS contact and non-contact pen
6.6/10about £16.98
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On this page
  1. 1.What each tool is actually doing
  2. 2.What GS38 allows
  3. 3.Prove, test, prove
  4. 4.At work, and at home

What each tool is actually doing

A neon screwdriver touches one conductor, and your finger on the cap puts your body in the return. A strike means treat that point as live. No strike means the lamp did not light. You have not measured between two points, and a nearby live conductor can light the neon faintly. A two-pole indicator uses two probes and shows the voltage between them without your body as the return. The standard is BS EN 61243-3. A Kewtech KT1720 only illustrates the class. It is not in this comparison, and there is no price for it here. A screen, or the word VDE, does not turn a screwdriver into that instrument. Types in this set are separated in the buying guide.

What GS38 allows

GS38 limits single-pole devices and non-contact detectors to identifying live equipment. They must not prove equipment dead. That covers a neon screwdriver and a volt stick in one rule. It also prefers a test lamp or two-pole detector to a multimeter, because a meter can be on the wrong range, the leads can be in the wrong sockets, and a flat battery can look like zero. Prove the indicator before and after, preferably on a proving unit. If it will not light there, you have no test. This page does not call any listing here GS38-compliant. DIN VDE 0680-6 on the Bosch SL3x65 is a phase tester to 250 V AC, not BS EN 61243-3. How to use a voltage tester screwdriver can show the cap. It cannot promote a dark lamp into a dead test.
Bosch Professional Bosch SL3x65 phase tester

Testsieger

Bosch Professional Bosch SL3x65 phase tester
8.6/10about £5.99
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Prove, test, prove

Prove the two-pole indicator on a proving unit, or on a known live source if that is all you have. Test at the point of work. Prove it again, so a lamp that died mid-test cannot pass as a dead circuit. NICEIC and SELECT describe that order. HSR25 wants the proof where you are working, not at a switch in another room. On single-phase the middle beat is line to neutral, line to earth, and neutral to earth. One screwdriver prod never sees two conductors at once. Three-phase needs more combinations, and it is a reason to stop. Where the work is paid, SELECT's lock and tag sit in the same sequence so the breaker cannot be closed on you.

At work, and at home

At work, regulation 12 of the Electricity at Work Regulations 1989 covers cutting off the supply and isolation, and regulation 16 requires competence. The screwdriver is not the instrument those notes describe. This page does not say that a neon in a drawer is an offence. It says the tool cannot discharge a duty to prove dead. A householder's own DIY is a different legal duty, because those regulations are about work. The failure is the same at home. A dark lamp is still not a dead rose, and a shock does not ask whether you are being paid. Isolate at the consumer unit, and hand over a board, a burnt accessory, or any paid job. For a pendant, the light fittings page is the practical limit: the wall switch is not the proof.

Common questions

What is a two-pole voltage indicator?
It is a tester with two probes that indicates the voltage between two conductors, without using your body as the return. GS38 prefers that class, or a test lamp, when the task is to prove equipment dead. BS EN 61243-3 is the standard GS38 points to. A named example such as a Kewtech two-pole indicator only shows the class. It is not one of the screwdrivers in this comparison.
What is a proving unit for?
A proving unit is a known source that shows the indicator still works, without relying on the installation you are about to trust. GS38 says you prove the device before and after the dead test. If the indicator does not light on that unit, you have no test. Proving a neon on a live socket does not turn the screwdriver into a proving unit.
Why not a multimeter?
GS38 prefers a test lamp or a two-pole detector. A multimeter can be on the wrong range, the leads can sit in the wrong terminals, and a flat battery can look like zero volts. That is a bad default when a false zero is the dangerous result. A two-pole indicator made for this job is harder to misread as dead for those particular reasons. It still has to be proved before and after.
Does DIN VDE 0680-6 on the Bosch tester change the answer?
No. DIN VDE 0680-6 is a phase-tester standard up to 250 V AC. On the Bosch listing it describes a glow-lamp screwdriver. It is not BS EN 61243-3, and it is not a statement that the tool may prove an installation dead. The rest of the set, including titles that only say VDE, are further from that standard, not closer to GS38.
Does GS38 apply to a householder changing a lamp?
GS38 is written for electrical test equipment used in work. The Electricity at Work Regulations cover work, and this page does not claim a householder is prosecuted for owning a neon screwdriver. The physics is the same at home. A dark neon still does not prove a ceiling rose dead.

Related pages

Prove a circuit dead before you open it

Voltage tester screwdriver

Best voltage tester screwdriver: pick, skip, price

Voltage tester screwdriver: neon, pen, phase tester

How to use a voltage tester screwdriver at a socket

Voltage tester for changing a light: UK ceiling rose

Sources

Public UK sources and the amazon.co.uk listings in this comparison. Listings captured 15 October 2026. Page updated October 2026.

  1. HSE GS38: Electrical test equipment for use on low voltage electrical systems (retrieved 15 October 2026)
  2. Electricity at Work Regulations 1989, regulation 12 (retrieved 15 October 2026)
  3. Electricity at Work Regulations 1989, regulation 16 (retrieved 15 October 2026)
  4. HSE HSR25: Memorandum of guidance on the Electricity at Work Regulations 1989 (retrieved 15 October 2026)
  5. NICEIC: Safe isolation procedure in 10 easy steps (retrieved 15 October 2026)
  6. DIN VDE 0680-6:2021-08 phase tester (retrieved 15 October 2026)
  7. DIY FAQ: Neon screwdriver (retrieved 15 October 2026)
  8. Neon tester training note (retrieved 15 October 2026)
  9. amazon.co.uk listings captured 15 October 2026 (retrieved 15 October 2026)